There are 5 US Post Offices in Clearwater County serving a total of 8,116 residents equating to 1,623 residents per post office. It's estimated that approximately 12,954 packages are handled across the 5 county post offices annually. Clearwater County is a county located in the U.S. state of Idaho. As of the 2010 census, the population was 8,761. The county seat is Orofino. Established in 1911, the county was named after the Clearwater River. The county is home to North Fork of the Clearwater River, and a small portion of the South Fork and the main Clearwater. Also in the county are the Dworshak Reservoir, Dworshak State Park, Dworshak National Fish Hatchery, and the Dworshak Dam, third highest dam in the U.S. The modest Bald Mountain ski area is located between Orofino and Pierce.